Roasting-furnace.



PATENTED AUG. 13, 1907.

G. B. KIRK.

ROASTING FURNACE.

APPLICATION FILED JAN. 12, 1906.

- INVEN'I'OR WITNESSES:

B2" W o ATTORNEY.

UNITED sTA s PATENT ()FFILE.

til'lORGll E. KIRK, OI" TOLEDO. OlllO. ASSTGNOR TO ALLIS-CHAIAlERS COMPANY, OF

MILWAUKEE, \VlSGOXSl N, A CORPORATION OF NEW JERSEY.

ROASTING-FURNACE.

Specification of Letters Patent.

Patentd Aug. 13, 1907.

Application filed January 12,1906- Serial N0. 295,719.

"u all reimm it may mnt'ern: 7

l e it; known that l. ('iuonor: E. the lfnited States. residing at oflueas and limit. a eitizen of "and useful Improvements in RoastingFurnaees. of

-whi -h the following is a speeilieatioii.

This invention relates to stiffening a working member aml (out-rolling the temperature thereof.

This invention has utility when used in ore roasting furnaces and eompiises etlieient means for stiffening the arm. This stiffening is aeepmplished with the oxtra-ctionof a minimum amount of heat.

.plied to a roasting furnaee.

.ber \Vlilt'll is to'all intents and purposes the Referrin" to the drawin s: l i ure l is a artial \el v:

. I: z: D P

tical section of an emlmdiuient. of the invention as ap Fig. 2 is a seetion of the arm on the line ll-ll of Fig. 1. Fig. 3 is a partial vertical section of another embodiment of the invention as applied to a roasting furuaee. Fig. l is a seetion on the line ll lT of Fig. 3.

Referring to Figs. t and 2: the. hollow working member or arm l is insulated by a paeking 2 from the sup porting or stiffening member 3. 1n wasting furnaees 'and similar structures in which the apparatus disclosed as illustrative of this invention is adapted to be used, high degrees of heat must be withstot'nl by the rabble arms; and as these arms are of euusiderable length and weight, it is found that the metal of \\'lllt'll they are composed, .usually cast iron. beeomes sutlieiently softened by the heat to permit a, bending or distortion of the arm. The purpose of this invention is to provide a rabble shaft and its arms with a sup porting member n hieh is loeated Within said arms and protected from the heat of the furnaee by an insulating parking 2. Whit-h parking isfor i-onvenienee disposed between the interior surfaee of the arm and the exterior surface of thesupporting member. This eonstruetion permits the use ofa 'stroiig supporting memarm proper earried by the shaft, whil-around this arm is a heat insulating paeking, and on the outside of this heat insulating parking is tho arm 1, which serves to protr et. the paeking and to provide a durable member to whieh the rabbles proper may he seeuretl. This paele ing 2 may be a highly refractorysnbstaneo \Vlllt'll is a.

poor eonduetor of heat. A Cement capable of standing high temperatures, a sand, or other similar sub- Toledo. in the county State of Ohio. have invented (-ertain new i dium therethrough. which medium eould |ueon ,luetl l t l t i I *arm seeured to said shaft and lilt'lusilll hollow rotatable shaft 6. The temperature of the shaft (5 may be eontrolled by the eireulation of a meed one way by the pipe Tin the hollow shaft t. Should the ma ling medium used be a liquid, as water. the supporting member 3 would have tight lit in the shaft ti by means of a. gasket or parking 8. The supporting member 3 may be eentered in relation to the sleeve or arm l y means of bloeks 9 of a noireondueting material. as quartz. The outer end of the sleeve is closed b \'a plate l0 bolted thereto. g

Referring to Figs. 3 and 4: the working arm or sleeve, It has the nou-eonduetoi' par-king 12 surrouiuling the' stiffening member lb. This tum-conductor paeking 2 is a poor heat eonduetor and serves to insulate the support [If from the sleeve ll. .tdjaeent the stiffen- 5 ing member I3 is the heat eouduetor H. The arm 11 may e attaehed by bolts to to the hollow' rotatable shaft lti. In this hollow shaft lti is a pipe l7 affording means for the tll'CllltlllUll f a medium therethrough for eo|itrolling the tmnperature of the shaft and arms. In the ends of the stiffening member 13 are plugs 18, the one at the inner end serving to keep out water, it surh liquid be used as the eireulating medium. stiffening member iii may be braeed or centered as to the sleeve or arm by wedges or blocks 1.). which blot-ks or wedges may be of a highly refraetonv non-.romlueting material. as quartz. The outer end of the arm is t'losed by a cap .10 bolted thereto.

hat is claimed and it is desired to seeure by Letters Patent is:

l. temperature eontrolled shaft. an arm. n for the arm. and a heat renduetor for the support.

2. temperature eoutrolled shaft. auarm. and an lnsu lated lilillul'l for the arm.

ii. The eombiualiou with a shaft. of a supporting member supported b v and extended from s. d shaft. ti hollow arm ltit'lnsillg said supportiuu' member, and a heat insulilllilg parking interposed between the interior surl'nee of said arm and said nn-mber.

t. 'lheaomhination with a shaft. of a supporting meur her supported by and extended from said shaft. a hollow "rid sup orting member. and a heat iusnlaliu; par-kin nlerposed be-' tween the interior surfaee of said arm and said member.

3. The t'ombiuatiou with n hollow shaft adapted to re- 95 reive alluld temperature eoutrolliug medium. of a support in;- member supported by and extended from said shaft. :1 hollow arm. and a heat insulatin pat-king interposed between the interior surfnee of said arm and said member.

ii. The eombilmtiou with a hollow shaft adapted to re- 40!} ('eive a fluid leuun-ralure tnilii'ollliig medium. of a supporting' member supported by and extended from said The i shaft, a hollow arm, a heat insulating packing interposed between the interior surface of said arm and snid member. and a heat conductor in close proximity to said support wlthin suid arm, said heat conductor being extended into the path of the current of temperature controlling fluid whlgh may be circulated within said shaft.

7. The combination with a hollow shaft adapted to receive a fluid temperature controlling medium, of asupporting member supported by and extended from said shaft, a hollow arm, a heat insulating packing interposed between the interior surface of said arm and said member, a heat conductor in close proximity to said support within said arm. said heat conductor being extended into the path of the current of temperature controlling fluid which may be circulated within said shaft, and means to prevent said fluid contacting with said insulating pn'cking.

In testimony whereof i affix my signature in-preseime 0L two witnesses. I

GEO. E. KIRK. Witnesses G. F. Dn Wrnx, ELLA BRICKELL. 

